Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
selg
←
Proto-Celtic
*selgā
(inherited)
←
Proto-Indo-European
*selǵ-
(derived)
→
Welsh
hel
(cognate)
→
Irish
seilg
(inherited)
→
Scottish Gaelic
sealg
(inherited)
→
Ancient Greek
σπλήν
(cognate)
→
Manx
shelg
(inherited)
→
Latin
lien
(cognate)
→
Old Irish
fíad
(link)